20266899 has 8 divisors (see below), whose sum is σ = 27082752. Its totient is φ = 13481160.

The previous prime is 20266877. The next prime is 20266927. The reversal of 20266899 is 99866202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20266899 - 2⁵ = 20266867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20266899.

It is not an unprimeable number, because it can be changed into a prime (20266849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5907 + ... + 8684.

It is an arithmetic number, because the mean of its divisors is an integer number (3385344).

Almost surely, 2^20266899 is an apocalyptic number.

20266899 is a deficient number, since it is larger than the sum of its proper divisors (6815853).

20266899 is a wasteful number, since it uses less digits than its factorization.

20266899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15057.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 20266899 is about 4501.8772750931. The cubic root of 20266899 is about 272.6438888825.

The spelling of 20266899 in words is "twenty million, two hundred sixty-six thousand, eight hundred ninety-nine".